Igraine's younger sister and Morgaine's aunt. She becomes Queen of Orkney, marries a regional lord, and raises her son. She secretly curses the queen with infertility to secure her lineage's claim to the throne. She later aids Morgaine during her pregnancy, eventually adopting and nursing the infant after Morgaine's fever, and ultimately dies accidentally during a confrontation with the High Priestess.
Morgause and Morgaine are half-sisters
Morgause is the daughter of Igraine and Uther Pendragon.
Morgause is Arthur's half-sister
Morgause raises Mordred as her own son
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